Thursday, May 3, 2012

DNA and Genomics - Have you wondered...

Q1) DNA is a polymer of deoxyribonucleotides (that contain either A/C/G/T as its nitrogenous bases). For the genetic code contained in DNA to be able to code for all 20 amino acids, the genetic code has to be a triplet code.

Given the above information, calculate (means workings must be shown) how many codons there are altogether. How many of these codons code for amino acids? Explain your answer. 

Q2) Given that there are XXX number of codons coding for amino acids, there should be the same XXX number of tRNA molecules available, as the anticodon on tRNA complementary base pairs to the codon on the mRNA.


However, this is not true. Explain why. 

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